4. what is the age of nevada's oldest rocks?

Which theory suggested that the earth was once a signle supercontient that gradually that broke up into the contients that we know today

Why is the study of demography important to geographers

Acivilization exists for several hundred yeaars, developing its own language. such a civilization probably has been: a. farming corn b. suffering from a lack of contact with the outside world. c. isolated by mountains or some other physical barriers. d. starving from lack of trade.